invaluabletool
nounUK /ɪnˈvæljuəbl tuːl/
US /ɪnˈvæljuəbəl tuːl/
A thing that helps you a lot and is so useful you would never want to lose it.
A good dictionary is an invaluable tool for learning new words.
OTHER MEANINGS
2. A piece of equipment that is extremely helpful for a job.
The flashlight was an invaluable tool during the power outage.
3. A person or thing that makes a task much easier.
Her calm advice was an invaluable tool when we felt worried.
4. Something so useful that its worth cannot be measured.
Patience is an invaluable tool for a teacher.